STROKE DETECTION DEVICE, STROKE DETECTION METHOD, STROKE DETECTION SYSTEM, OPERATION LEVER UNIT, AND STROKE DETECTION SYSTEM FOR OPERATION LEVER

摘要

A stroke detection device in which each of four pistons (40) arranged in a row in a device body (10) is provided with a rod part (41), the stroke detection device for detecting a change in relative positioning of the four pistons (40) when one or two of the pistons (40) have stroked with respect to the device body (10) in order to reduce electric power consumption and decrease the number of signal lines. In each rod part (41), a magnet (70) is disposed so that a magnetic field occurs in a space between mutually adjacent rod parts (41) on a circumference thereof and the magnetic field changes when the rod parts (41) have stroked relative to each other, and between magnets (70) adjacent to each other in the device body (10), a magnetic field detection sensor (71) is disposed for detecting the magnetic field between each of the magnets (70) and outputting an electrical signal corresponding to the orientation of the detected magnetic field.